diff --git a/pkgs/gui-pkgs/gui-lib/mred/private/wx/win32/canvas.rkt b/pkgs/gui-pkgs/gui-lib/mred/private/wx/win32/canvas.rkt
index ec089a85fb..6e3b0751d8 100644
--- a/pkgs/gui-pkgs/gui-lib/mred/private/wx/win32/canvas.rkt
+++ b/pkgs/gui-pkgs/gui-lib/mred/private/wx/win32/canvas.rkt
@@ -394,7 +394,8 @@
        (when vscroll?
          (atomically
           (set! v-scroll-visible? (and v? #t))
-          (ShowScrollBar canvas-hwnd SB_VERT v?))))
+          (ShowScrollBar canvas-hwnd SB_VERT v?)))
+       (reset-dc))
 
      (define/override (do-set-scrollbars h-step v-step
                                          h-len v-len